122 . Sir D. Bruce and others. Trypanosome 



i 



After passage through rats for two years the short and stumpy forms have 

 nearly all disappeared, and with them the posterior-nucleated forms. In 

 Eat 407, on Table VIII, there are a fair number of posterior-nucleated 

 trypanosomes, on one day as many as 23 per cent., but this is exceptional. 



Morphology of the Naturally Infected Dog Strain. Strain II. Dog 690. 



Table X. — Measurements of the Length of the Trypanosome of Naturally 

 Infected Dog, Strain II, Dog 690. 



Date. 



No. 

 of 

 expt. 



Animal. 



jyLeijiioa. 01 

 fixing. 



XVletflOu. or 

 staining. 



Average 

 length. 



In microns 



Maximum 

 length. 



Minimum 

 length. 



1912. 

















July 26 ... 



911 



Eat 



Osmic acid 



Giemsa 



25 -3 



32 -0 



18 -0 



„ 26 ... 



911 





») 





23 -6 



30-0 



18 -0 



„ 26 ... 



911 









25 -0 



31 -0 



19 -0 



„ 27 ... 



911 





)> 





24-9 



32 -0 



15 -0 



„ 27 ... 



911 





3T 





25 -9 



32 -0 



18 -0 



„ 27 ... 



911 





33 





27 -0 



32 -0 



17 -0 



„ 30 ... 



911 





3J 





24 '2 



31 '0 



18 "0 



„ 30 ... 



911 





33 





25 -4 



30 -0 



18 -0 



„ 30 ... 



911 





3) 





25 -0 



31 -0 



18-0 



„ 31 ... 



911 





5) 





25 9 



32 -0 



19 -0 



„ 31 ... 



911 





33 





25 -2 



31 -0 



16 -0 



„ 31 ... 



911 





33 





26 -9 



32 -0 



18 -0 



Aug. 1 ... 



911 





33 





23 -4 



32 -0 



16 



„ 1 ... 



911 





J) 





23 -9 



33 -0 



17 -0 



„ 1 ... 



911 





» 





24 -2 



36 -0 



17 -0 



„ 2 ... 



911 





JJ 





21 -7 



27 -0 



17 -0 



» 2 ••• 



911 





33 





21 -0 



30 -0 



16 -0 



„ 2 ... 



911 









23 -4 



31 -0 



16 -0 



„ 3... 



911 





33 





21-5 



31 -0 



16-0 



3 ... 



911 





J J 





21 -6 



31 -0 



16 -0 



„ 3 ... 



911 





» 





21 -7 



29 -0 



16 -0 



„ 5 ... 



911 





3) 





21 -9 



32 -0 



17 -0 



5 ... 



911 





3) 





23 -2 



29 -0 



17-0 



5 ... 



911 





33 





22 -1 



30 -0 



17 -0 



„ 6 ... 



911 





33 





24 -2 



32 



17 -0 













23 -9 



36 -0 



15 -0 



